InputStream转String

 org.apache.commons.io.output.ByteArrayOutputStream

int i = -1;
//org.apache.commons.io.output.ByteArrayOutputStream
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while ((i = is.read()) != -1) {
	baos.write(i);
}
String content = baos.toString();

 

byte数组

int i = -1;
byte[] b = new byte[1024];
StringBuffer sb = new StringBuffer();
while ((i = is.read(b)) != -1) {
	sb.append(new String(b, 0, i));
}
String content = sb.toString();

  

java中 将字符串 转成 inputstream 转换后如何查看inputstream的size

String str = "something";
Byte[] bytes = str.getBytes() ;
ByteArrayInputStream bais=new ByteArrayInputStream(bytes);
int size=bytes.lenghth;

 将InputStream流转换成字符串 

 

InputStream fs=fi.getInputStream();
     int b;
      //顺序读取文件text里的内容并赋值给整型变量b,直到文件结束为止。
     StringBuffer sb=new StringBuffer();
     while((b=fs.read())!=-1 ){
      if((char)b=='\n'){
       sb.append("回车");
      }else{
       sb.append((char)b);
      }
     }
     out.println(sb.toString());